<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		
		<script>
			
			// 1.算数运算符 + - * / % ++ --
			// 2.字符串谅解  +
			// 3.关系运算符 > >= < <= == === != !==
			var a = 123;
			var b = "123";
			console.log(a == b);// true 不判断类型
			console.log(a === b);// false
			
			var raining = false;
			console.log(raining?"带伞");
		</script>
		
	</body>
</html>
